docs: def _get_port_speed_price_id(items, port_speed, no_public, location):
      """Choose a valid price id for port speed."""
  
      for item in items:
          if utils.lookup(item,
                          'itemCategory',
                          'categoryCode') != 'port_speed':
              continue
  
          # Check for correct capacity and if the item matches private only
          if any([int(utils.lookup(item, 'capacity')) != port_speed,
                  _is_private_port_speed_item(item) != no_public,
                  not _is_bonded(item)]):
              continue
  
          for price in item['prices']:
              if not _matches_location(price, location):
                  continue
  
              return price['id']
  
      raise SoftLayer.SoftLayerError(
          "Could not find valid price for port speed: '%s'" % port_speed)